Actually, I change my answer, everyone's gonna be going for tier sets, obviously. One may be more popular than the other, but for something really unique, farm raid drops that look like other classes' tier sets. For me, going with t5 warlock look with raid drops.

i have no idea, that's why i'll just farm every tier there is and change them around a bit (except for T11 and T12, i just hate them. stupid toilet-inspired gear)
probably starting with this weapon http://www.wowhead.com/item=11932#same-model-as just because it's a real priest staff

I've already had a set in my bags that I used to heal dungeons during Wrath of the Lich King. It's mostly Tier 5 with the Tier 4 shoulders and the Tier 7 head. And some weird boots I've picked up. I would like to use Benediction as a weapon, but since I mostly use main hand + off hand I'm not sure yet.

Retired Holy PriestAs a rule, I try to act on the internet as I would in real life. If I have offended you, feel free to point it out. Unless I meant to offend you, I will probably apologize.

The bastard of an upgrade quest in Sillithus where you have to get one of each of the grand elemental dudes took me 2 whole weeks of grinding at 80.
I was so enraged by the end of it!
The stupid wind guy never bloody spawned!